37 



shady nook, flourish as the green-bay tree. It will suffice to give a 

 small list, to show the mixed social nature of the vegetation: — 

 Marchantia. Polystichum, Adiantiim, Pimis strobus, Muhlen- 

 bergia sp., Carex albursina. Moms rubra, Calcorchis, Actaeo 

 rubra, Caulophylhim, BicucuUa Canadensis, Arabis sp., Dirca, 

 Pyrola cUiptica, Chimaphila umbellata, Gentiana quinquefolia, G. 

 flaz'ida, Thalcsia uniflora, Diervilla, Viburnum Opulus, Symphori- 

 carpus racemosus, Betula papyrifcra. The last is everywhere, a 

 marked and remarkable species. 



This has been but a mere surface scratching of the soil, but 

 I hope that I have made it plain that the cliffs of Jo Daviess 

 are plant resorts of great interest and that many ecological 

 problems are involved in the question of how such species have 

 taken up their abode in the seemingly inhospitable soil of rock, 

 and that, further, I have at least suggested the answer in some 

 cases. As a conclusion, it might be noted that the seeker after 

 plant knowledge on these precarious rocky heights may on oc- 

 casion be stopping to admire the brazen beauty of the poison 

 ivy or wonder at the innocent immaculate appearance of the 

 deadly Amanita and meet (with a backbone chill) the unwink- 

 ing glare of a huge timber-rattlesnake and stepping backward 

 to avoid the triple danger, plunge downv-zard a hundred feet 

 into the cold river beneath. 



